[FFmpeg-devel] Added MKV tag for AVS2 video codec

[Ze Yuan]

>From ea96e70874c87b003af1fb3fcd5c792b3292bf29 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=83=91=E5=A4=A9=E6=B3=A2?= <naturalwalker at hotmail.com>
Date: Sun, 6 Sep 2020 18:35:51 +0800
Subject: [PATCH V3] Added MKV tag for AVS2 video codec

avs2 (IEEE 1857.4) video codec

MKV spec: V_AVS2 Codec ID: V_AVS2 Codec Name: AVS2-P2/IEEE.1857.4
(https://github.com/cellar-wg/matroska-specification)

Standard document:
1857.4-2018 - IEEE Standard for Second-Generation IEEE 1857 Video Coding (https://ieeexplore.ieee.org/document/8821610)

Encoding tool:
Ffmpeg with avs2 enabled: https://github.com/xatabhk/FFmpeg-avs2-avs3/releases
Command line:

             ffmpeg -i xxxx.mp4 -vcodec avs2 -acodec copy xxxx_avs2.mkv
             ffmpeg -i xxxx.mp4 -vcodec avs2 -speed_level 4 -acodec copy xxxx_avs2.mkv`

Players:
(1) Ffmpeg with avs2 enabled: (https://github.com/xatabhk/FFmpeg-avs2-avs3/releases):
Command line:

             ffplay xxxx_avs2.mkv`
(2) VLC 3.0.x with avs2 enabled: https://github.com/xatabhk/vlc-3.0-avs2-avs3/releases
(3) Mpc-hc 1.9.x with avs2 enabled: https://gitee.com/zhengtianbo/cavs-avs2-avs3_decoder_added_to_mpc_hc/releases

Avs2-MKV samples:
https://github.com/xatabhk/avs2-avs3-video-samples

---
libavformat/matroska.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/libavformat/matroska.c b/libavformat/matroska.c
index 7c56aba403..2ce60c6277 100644
--- a/libavformat/matroska.c
+++ b/libavformat/matroska.c
@@ -78,6 +78,7 @@ const CodecTags ff_mkv_codec_tags[]={
     {"S_HDMV/TEXTST"    , AV_CODEC_ID_HDMV_TEXT_SUBTITLE},

     {"V_AV1"            , AV_CODEC_ID_AV1},
+    {"V_AVS2"           , AV_CODEC_ID_AVS2},
     {"V_DIRAC"          , AV_CODEC_ID_DIRAC},
     {"V_FFV1"           , AV_CODEC_ID_FFV1},
     {"V_MJPEG"          , AV_CODEC_ID_MJPEG},
-- 
2.25.1